1220212253 has 4 divisors (see below), whose sum is σ = 1314074748. Its totient is φ = 1126349760.

The previous prime is 1220212249. The next prime is 1220212277. The reversal of 1220212253 is 3522120221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3522120221 = 937 ⋅3758933.

It can be written as a sum of positive squares in 2 ways, for example, as 238455364 + 981756889 = 15442^2 + 31333^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220212253 - 2² = 1220212249 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220212753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46931228 + ... + 46931253.

It is an arithmetic number, because the mean of its divisors is an integer number (328518687).

Almost surely, 2^1220212253 is an apocalyptic number.

1220212253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1220212253 is a deficient number, since it is larger than the sum of its proper divisors (93862495).

1220212253 is an equidigital number, since it uses as much as digits as its factorization.

1220212253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93862494.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1220212253 is about 34931.5366538605. The cubic root of 1220212253 is about 1068.5916933974.

Adding to 1220212253 its reverse (3522120221), we get a palindrome (4742332474).

The spelling of 1220212253 in words is "one billion, two hundred twenty million, two hundred twelve thousand, two hundred fifty-three".